I just checked my blog and found some weird problem. All text after <--more--> tag has disappeared. I did check in post at code view and found <--more--> tag has been converted to normally <a> tag. I don't know when this thing did happen but luckily for me that cached page on Google saved me. I wonder if others face this problem same as me or just me. How this thing happened? How can I prevent this thing from happen in the future?